Method of treating beer or ale.



"LEO wnL-niins'rnxngor NEW YORK, N. Y.

. ii; .I 4 Specification of Letters Extent.

.iun'rnon or rzenhrrno BEER on ALE.

Patented' Ju n'e 20, 1911.

No thawing. flrlglnalapplication filed April 11, 19 10, Serial No. 554,645; Divided and-this application filed May 9, 1911. Serial No. 626,014.

13 all whom it-inay concern:

Be it known that I, LEO VVALLERSTEIN a subject of the'Emperor otGermany, l'GSlding at New York, in the county of New York and State ofNew York, have invented certain new and useful Improvements in Methods of Treating Beer or Ale, of which the followingis a specification.

.This invention relates to the preparation of beers andales, and more particularly to the preparation of improved bottled beers, the object'of the invention beingtheprm duction of bottled 'beers which possess great stability and which do mot become turbid or clouded even when placed on ice for considerable periods. I

- The terms beer and ale are'herein used in their usual accepta'tion as indicating lager beers and brilliant ales, as distin guis'hed from medicinal preparations, such as malt extracts.

Most bottled beers, when correctly brewed and .stored at low temperatures, will remain clear and brilliant for some time if placed upon ice directly after bottling. The same beers however, after pasteurization, are far less resistant to cold'and usually cloud or become turbid when placed on ice. This sensitiveness to cold becomes more pronounced after the beers have been bottled for some time, and in many cases it is found that the beer not only clouds when chilled, but the bottles show a sediment consisting mainly of precipitated proteid matter. The probable reason for. the clouding of chilled pasteurized beers is that during the pasteurization a part of the proteids contained in thebeer are so modified that they become in soluble upon chilling, thereby causing turbidity.

According to the present process, there is added to the beer at any suitable stage of the brewing, that is to say at any period subsequent to the cooling of the wort, and usually after the conclusion of the main fermenta tion, a proportlon of proteolytic' enzyms active in slightly acid media sufiicient to modify the proteids contained in the beer in such manner that they will not-be precipir tated upon chilling subsequent to pasteurization, the beer being rendered chillproof in the sense that it is capable ofremalning brilliant even when keptupon ice'for a considerable time. In practice it has been found advantageous in most cases to'add the enzyms to the clarified beer shortly before bottling; During-" the pasteurization which. follows the bottling,- the enzyms become active and those proteidswhich would cloud the beer when chilled are so modified daylight. I have also found that if the 'proteolytic enzyms be added in suflicient quantity, and if excessive temperatures are not used-duringpasteurization, the enzyms remain active after pasteurization. By their activity subsequent to pasteurization they exert: a further beneficial influence, inasmuch as they are found to have a peptonizing efi'ect upon the proteids while the bottled beer is stored at ordinary. temperatures. This fact is of particular advantage in the case of beers which are to beshipped long distances or. stored in bottles for long periods, or which'are required to undergo climatic changes; for such treatment as is well known increases greatly the sensitiveness of bottled beerswith respect to cold and even produces a sediment in the bottles. The above described peptonization occurring at ordinary temperatures in the bottles is found however to impart to the beer the capability of enduring long storage, transportation or climatic change without becoming sensitive to cold.

. It is not practicable to specify all pro- I teolytic enzyms which are suited for use in accordance with this invention, or to state a definite proportion in which each should be added. Enzyms which are suitable for the pur Jose above described are widely distributeci in the vegetable and animal kingdoms, are readily prepared in concentrated form by known methods, andtheir preparations have in several instances become standard articles of-com'meroex Such preparations 1 are not however, pure in, the sense of. consisting solely of enzyms' 'or of a-single ceases enzym, and all proteol ticenz ins are in practice reco nized on y by t on effects l erting theproper modifying action upon the. I I i Q u u proteids under I the conditions existing in beers or ales during or after pasteur1zat1on.

u on proteid w l matter. The source from iich proteolytic enzyms are derived 1sv not material or important, provided the preparation is free from constituents in ur10us to the beer and the enzymsare capable of ex The enzyms selected should be such as are capable of inducingproteolysis in slightly acld liquids, and such as are not destroyed orrendered pennanently inactive by subjection to the usual temperatures of pasteurlza tion. The activity of enzyms from various sources differs greatly, their activitybelng also affected by their mode of preparation or concentration; and inasmuch as the areportion or quantity to be used'is depen entupon their activity, .it is evident that such proportion of quantity'can be specified only' inp rticul'a'r cases,"being however readily determined b simple-test for each case.

Enzyms wiich are suited for use 1n accordance Wit-h this invention may be prepared from-malt by known methods; (compure for example- Fernbach and Hubert, Compt. Bend. de ZAcad. des Sciences, 1900, 130, 1783; 131, 293; Windi'sch' and bchellhorn, Tlochensch. Bram, 1900, 1'1, 334; and

Weiss, OomphR'end. Tra'vL Laborat, Carlscases be tested as to their effects upon beer berg, 1903, 5,135 I have also been able to prepare an en capable of producing the above describe efiects'uponbeer in accordance with the following method: Green'malt- -which has'been riod of one to twotiweeks according to conpermitted. to grow for a peditions, is finely ground, preferably with the addition of quartz sand. The ground product issaturated with: a: solution containing 0.1 to 0.3 pericent; of hydrochloric-acid and is pennittedto stand at room temperatures for twelve to twenty-four hours. The acid liquid-is then expressed under heavy pressure, and is mixed with several volumes of strong alcohol. The resulting. precipitate contains the en'zym, and isquickly separated'from the liquid and-dried in vaouo at temperatures not exceedi inactive by factors the presence of which-it is oftendiflicultor impossible to recognize. Hence-it may occur that preparations made under seemingly identical conditions may differ wideln their-activity or. in their suitability or the-purposes of this invention. Hence the preparations should all before usinglthem; U Besides t e peptase prepared from inalt,

reparations containing roteo'lytic p m other sources are wel adap ed: ,fo me,

'should' be clearly understood t lat, these enare extremely sensitive tqphysical and 1 emical conditions,- and may be rendered provided. onlythey .areiactive in slightly acid media and are free from substances in- -jurious to the beer. Thus I may mention by way of example papain', .derived from papaw,'bromelin, from .the fruit of the pineand pepsin which'exhibit a. comparatively. high. de ree of activity, say in excess of 1530001 that is to say which are 'capablemna ple '(see Biochemie der Pflanzen,f0zapek,

J dna,.1905, Volume II, p.167), .and pepsin, I from the gastric secretions of rna'1nmals' Those commercial preparations of. papain der the standard conditions recited in the U. 18-. Pharmacopoeia. of. digest-in" at' least 3000 times their weight 01; freshly coagulated egg-albumen) have been'found'to be suitablejor the purposes of this invention. It, shouldbe understood that zyinogens convertible into proteolyti'c enzyms may serveas additions-to the beer, givm rise therein to the" respective enzyms. l 1th referenceto pepsin, it is commonly stated that this'. enzym is rapidly destroyed by warming to .5057; I have-found however that under the conditions obtaining durinw pasteurizaafter pasteurization.

The proportion of the enzym to be added centage of coagulable albuminoids in the an activity of 1:6Q00, may be employed in the. proportion of one to five grams per barre of thirty-one the proportion being increased or'diminished according as the activity'of the preparation may vary from the above standard, and ac.- eording to the percentage of coagulable albuminoids contained in; the beer. As above dependsj primarily uponihe activity of the preparation, and secondarily upon the per- .beer. As a general rule, a-n'enzym exhibiting.

tionlof beer at temperatures 0? 57'60 C., the pepsin exhibits'activity both during and gallons of beeror'ale,

stated, the enzym is preierably added to the filtered or otherwise clarified beer shortlybefore bottling, but the addition may be made if desired-atany other suitable stage ofthe process, as for example during storage. The additionof the enzym preparat-he beer again sensitive to cold.

tions-in excessive proportions may render beers and ales prepared in accordance 'with this mvention. and containing active proteolytic enzyms, that they are not only thempasteurized beers, bntthe are capable, of imparting this quality 'un er proper condi'-. tions to from the preseneethere'in of proteid mat- It is a distinguishing characteristic" of rs which'are sensitive to cold:

selves. far less'sensitive to cold than most ter. For example, if a beer containing roteolytic enzyms be. mixed with an equ or -on ice, andthe mixture kept fora suitable le'sser volume of a beerwhich becomes turbid from the separation of protei'ds when placed enzyms period at. a temperature favorable w 'm- :fieollsisrthis' mixture will. found: hem.- .1

' I in general the enzyms in a state of activity skilled in the art. 20

can be detected by their proteolytic effects upon various albuminous substances or pro- 'teids, it being preferable to select for the detection of each enzym such proteids as are proven to be highly sensitive to its effects, as will be readily understood by those The above tests are also applicable to the detection of proteolytic enzyms in various media other than beer or Correction In Letters Patent No 995,826.

ale, as for example -in plant or animal secretions or any preparations made therefrom.

Ido not herein claim broadly the preparation of stable beers and ales bythe addition .thereto of proteolytic enzyms, or thebeers or ales so treated, said subject-matter, as

well as the addition of such enzymatic preparations asmay be derived from malt, be

ing claimed in my copending application Serial No. 554,645, filed April 11, 1910, whereof the present application is a division; nor do I claim herein the treatment 'of beers or aleswith proteolytic' enzyms derived from the gastric secretions of mammals, said subject-matter being claimed in an application filed April 8', 1911, Serial No. 619,675; nor do I claim herein the treat ment of beers or ales with papain, said subject-matter being claimedin an application filed April 8, 1911, Serial No. 619,676.

1. In the art of brewing, the step which consists in adding bromel n to beer or ale, before bottling.

2. In the art of consists in adding bromelin to beer orale, and subsequently pasteurizing. i

In testimony whereof, I aflix my signature in presence of two witnesses.

LEO \VALLERSTEIN.

\Vitne'sses:

C. P. TOWNSEND, E. DANIELS.

Copies of this patent may he obtained for live cents each, by addressing ,the Commissioner of Patents, Washington, D. C.

upon the tion therein that the same may [snan] It is hereby certified that in Letters Patent application of Leo WVallerstein,

No. 995,826, granted June 20, 1911,

of New York, N. Y.', for an improvement in Methods of Treating Beer or Ale, an error appears in the printed specificationrequiring correction as follows Page 2, line 89, the symbol 550 -57 should read 55-57 U; and that the said Letters Patent should be read with this correcconform to the record of the case in the Patent Signedand sealed this 25th day of July, A 1911.

E. B. MOORE,

Commissioner of Patents.

brewing, the step which I in general the enzyms in a state of activity skilled in the art. 20

can be detected by their proteolytic effects upon various albuminous substances or pro- 'teids, it being preferable to select for the detection of each enzym such proteids as are proven to be highly sensitive to its effects, as will be readily understood by those The above tests are also applicable to the detection of proteolytic enzyms in various media other than beer or Correction In Letters Patent No 995,826.

ale, as for example -in plant or animal secretions or any preparations made therefrom.

Ido not herein claim broadly the preparation of stable beers and ales bythe addition .thereto of proteolytic enzyms, or thebeers or ales so treated, said subject-matter, as

well as the addition of such enzymatic preparations asmay be derived from malt, be

ing claimed in my copending application Serial No. 554,645, filed April 11, 1910, whereof the present application is a division; nor do I claim herein the treatment 'of beers or aleswith proteolytic' enzyms derived from the gastric secretions of mammals, said subject-matter being claimed in an application filed April 8', 1911, Serial No. 619,675; nor do I claim herein the treat ment of beers or ales with papain, said subject-matter being claimedin an application filed April 8, 1911, Serial No. 619,676.

1. In the art of brewing, the step which consists in adding bromel n to beer or ale, before bottling.

2. In the art of consists in adding bromelin to beer orale, and subsequently pasteurizing. i

In testimony whereof, I aflix my signature in presence of two witnesses.

LEO \VALLERSTEIN.

\Vitne'sses:

C. P. TOWNSEND, E. DANIELS.

Copies of this patent may he obtained for live cents each, by addressing ,the Commissioner of Patents, Washington, D. C.

upon the tion therein that the same may [snan] It is hereby certified that in Letters Patent application of Leo WVallerstein,

No. 995,826, granted June 20, 1911,

of New York, N. Y.', for an improvement in Methods of Treating Beer or Ale, an error appears in the printed specificationrequiring correction as follows Page 2, line 89, the symbol 550 -57 should read 55-57 U; and that the said Letters Patent should be read with this correcconform to the record of the case in the Patent Signedand sealed this 25th day of July, A 1911.

E. B. MOORE,

Commissioner of Patents.

brewing, the step which It is hereby certified that in Letters Patent No. 995,826, granted June 20, 1911,

upon the application of Leo VVaHerstein, of New York, N. Y., for an improvement in Methods of Treating Beer or Ale, an error appears in the printed specification requiring correction as follows: Page 2, line 89, the symbol 50-57 sh ld read 55 57' U; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the ease in the Patent Office. i

Signed anei sealed this 25th day of July, r 1)., 1911.

i E. B. MOORE,

Commissioner of Patents.

[snub] 

